dot-emacs/lisp/init-lsp.el

;; LSP mode
(use-package lsp-mode
  :config
  (lsp-register-custom-settings
   '(("gopls.completeUnimported" t t)
     ("gopls.staticcheck" t t)
     ("pyls.plugins.pyls_mypy.enabled" t t)
     ("pyls.plugins.pyls_mypy.live_mode" nil t)
     ("pyls.plugins.pyls_black.enabled" t t)
     ("pyls.plugins.pyls_isort.enabled" t t)))

  ;; disable infantile nonsense
  (setq lsp-headerline-breadcrumb-enable t
        lsp-modeline-code-actions-enable nil)

  ;; (lsp-enable-which-key-integration t)

  :bind
  ("C-c n". #'lsp-rename)
  ;; I am using lsp-ui for this, see below
  ;; ("C-c r" . #'lsp-find-references) ; default: C-c C-l g r
  ;; ("C-c d" . #'lsp-find-definition) ; default: C-c C-l g g
  ;; ;; same as above, but directly within prefix, not 'g neede
  ;; ("C-c C-l r" . #'lsp-find-references) ; default: C-c C-l g r
  ;; ("C-c C-l d" . #'lsp-find-definition) ; default: C-c C-l g g

  :init
  ;; I'm not using any of th  lsp commands, but better define a prefix
  ;; than being unable to reach it
  ;; FIXME: add at least lsp-find-definition
  (setq lsp-keymap-prefix "C-c C-l"
        lsp-log-io nil
        lsp-enable-indentation t
        lsp-enable-imenu t
        lsp-file-watch-threshold 500
        lsp-prefer-flymake nil)

  :commands lsp)

;; for lsp code lenses etc
;; https://emacs-lsp.github.io/lsp-ui/
;; FIXME: ⛔ Error (use-package): Failed to install lsp-ui: https://melpa.org/packages/lsp-ui-20250804.2109.tar: Not found
;; manually installed using package-install
(use-package lsp-ui
  :ensure t
  :after (lsp-mode)
  :commands lsp-ui-doc-hide

  :bind (:map lsp-ui-mode-map
              ("C-c d" . #'lsp-ui-peek-find-definitions)
              ("C-c r" . #'lsp-ui-peek-find-references)
              ([remap xref-find-definitions] . lsp-ui-peek-find-definitions)
              ([remap xref-find-references] . lsp-ui-peek-find-references)
              ;;; ("C-c u" . lsp-ui-imenu) ;; using treemacs for this
              ("C-c D" . tvd-lsp-doc-toggle))

  :init
  (setq lsp-ui-doc-enable t ;; enable on the fly with "C-c D"
        lsp-ui-doc-use-webkit nil
        lsp-ui-doc-header t
        lsp-ui-doc-delay 0.2
        lsp-ui-doc-position 'top
        lsp-ui-doc-side 'right
        lsp-ui-doc-include-signature t
        lsp-ui-doc-alignment 'at-point
        lsp-ui-doc-use-childframe t
        lsp-ui-doc-border (face-foreground 'default)

        ;; C-c r
        lsp-ui-peek-enable t
        lsp-ui-peek-show-directory t
        lsp-ui-peek-peek-height 40

        ;; FIXME: maybe this is too much, check at work
        lsp-ui-sideline-enable t
        lsp-ui-sideline-update-mode 'point
        lsp-ui-sideline-show-code-actions nil
        lsp-ui-sideline-show-hover t
        lsp-ui-sideline-delay 2
        lsp-ui-sideline-show-diagnostics nil
        lsp-ui-sideline-diagnostic-max-lines t
        lsp-ui-sideline-ignore-duplicate t)

  :config
  (add-to-list 'lsp-ui-doc-frame-parameters '(right-fringe . 8))

  (defun tvd-lsp-doc-toggle()
      "Toggle lsp-ui-doc, takes effect only on buffer start.
So in order to change in a buffer, reload the buffer after
the toggle with shift-F5."
      (interactive)
      (setq lsp-ui-doc-enable (not lsp-ui-doc-enable))
      (tvd-buffer-reload))

  ;; `C-g'to close doc
  (advice-add #'keyboard-quit :before #'lsp-ui-doc-hide))


;; better recursive refs, symbols, etc
;; see also https://github.com/Alexander-Miller/treemacs
(use-package lsp-treemacs
  :after lsp

  :bind
  ("C-c u" . #'lsp-treemacs-symbols)
  ("C-c C-l c" . #'lsp-treemacs-call-hierarchy))

(use-package treemacs
 :bind
 ("C-c t" . #'treemacs)

 :init
 (setq
  treemacs-project-follow-mode t
  treemacs-extra-wide-toggle t
  treemacs-follow-mode t))

(provide 'init-lsp)
;;; init-lsp.el ends here